Device for facilitating the insertion of ringed pistons into cylinders.



D. H. BURD.

DEVICE FOR FACILITATING THE INSERTION 0F RINGED PISTONS INTO CYLINDERS.

APPLICATION FILED 050.27.1915.

1 ,204A02. Patented Nov. 14, 1916.

DAVID E. BUBD, OF VEBONA, NEW JERSEY.

DEVICE FOR FACILITATING THE INSERTION 0F BINGED PISTONS INTO CYLINDERS.

Specification of Letters Patent.

Patented Nov. ML, 1916..

Application filed December 27, ms. Serial no. eases.

To all whom it may concern:

Be it known that 1, DAVID H. Born, a citizen of the United States, and a resident of Verona, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Devices for Facilitating the Insertion of RingedPlstons into Cylinders, of which the followmg 15 a specification.

This invention relates to a device for making it easy to assemble a piston, its rings, and a cylinder, the device holding the piston rings compressed in thelr grooves while the piston is being inserted in the cylinder, the edge of the cylinder forcing the device from the rings as the piston advances into the cylinder. It is a common practice now to hold these rings n place by hand, each ring being held while it is in its groove and during its insertion into the cylinder, and

then the next ring is taken and also placed in in the same way. This is a slow process and usually requires more than one workman, and in repair shops and in garages the expense and time consumed in such operations are considerable.

This invention is adapted to take hold of a plurality of rings, tightly bind them so that they are of the same diameter as the piston and then release the rings successively as the cylinder grasps the rings in succession. The device is also adjustable so that it can be used on any size piston and is quickly attached to or detached from the piston.

The invention is further designed to provide a device of this kind which is easily operated, since the leverage on the handles is transmitted to a band that passes around the piston rings, these handles being pivoted comparatively close to said band so that the band at all points is tightly held against the ring and there are no projecting bulged parts in the band.

The invention is subject to modifications and changes in the details of its construction without departing from the scope of the claims.

The invention is illustrated in the accompanying drawing, in which Figure 1 is a perspective view of the device when not in use, the parts being shown slightly separated so as to more clearly illustrate the construction. Fig. 2 is a side view of the device in place on a piston, this view also illustrating the lower part of a cylinder about to be passed over the piston to bring about the insertion of the piston and its rings into the cylinder.

In the drawing, 10 is the piston, 11 are the piston rings, and 12 is the cylinder. The piston rings are adapted to bear tightly against the inside of the cylinder, and for ,this reason they have a rather strong spring action. The rings being normally larger than the outside diameter of the piston, it therefore becomes necessary to compress the piston rings, which are split for this purpose, so that thev are at least as small as the diameter of the piston. My device for accomplishing this consists of a band 13, this band being of any suitable width, but it is usually wide enough to embrace allthe piston rings if more than one ring is used, the drawing showing two rings. The band is usually made of flexible material, such as steel, and is thick enough to withstand the strain of compression, the band having projecting parts at the top edge, in the form shown this being provided by bending over lips 14 to form the projecting portions and extending radially beyond the band 13. The top edge of the band can be used as an abutting face, but it is preferable to place these abutments 14 on the top edge to give a larger bearing surface. The ends of the band are free and are adapted to overlap so that the band can be used on different sizes of pistons. Means are provided for drawing these overlapping edges together, and, if necessary, into overlapping position and holding such band in this reduced or tight position around the piston rings of a piston. The tightening and holding means in the form illustrated consists of a pair of handles 15 and 16, one of these handles, as 16, being pivotally connected as at 17 to one of the ends of the band 13, the other handle 15 being pivotally connected at its end 18 to a toothed arm 19 which is preferably slightly curved to fit around to the approximate curvature of the band when it is in normal position, the teeth 20 of this arm being adapted to be caught over a bracket 21 fastened to the other end of the band 13, but far enough back from its free edge to permit the required amount of overlapping. The bracket 21 is preferably provided with an arm 22 which is adapted to be seated between the recesses 23 between the teeth 20 of the arm 19.

The handles 15 and 16 are pivoted as at 24, this pivot being arranged relativel close to the band so as to allow considera le leverage on the outer ends-of the handles and permitting the application of force close up to the ends of the bands so as to hold them together tightly at their overlapping ends and thus prevent bulging inequalities in the band when it is in place. Suitable means for'holding the handles 15 and 16 in position, when they are drawn together, is provided, the loop 25 being one form of holding device, the loop being adapted to be seated in indentations or recesses 26 in the edges of the handles and 16.

It will be seen from this description that by reason of the series ofteeth and the notches 26 with the loop 25, that a considerable range of adjustable positionsis possible, and this, together with the natural 20 give or spring of the parts, provides for an absolutely tight clamping of the band around the piston 10. When the device is clamped into position as shown in Fig. 2,

the inner face of the bands holds the piston rings within' the piston and to the same diameter as the piston, then the cylinder 12 is placed'over the piston and slid down over it so that the piston is thus inserted in the cylinder, the bottom edge 27 of the cylinder so-engaging the abutments 14 or the top edge of the band 13 and the band is thus forced to pass down over the piston, and as it slides over the rings they are released from the band andgrasped by the cylinder, then successively put into position Without difficulty and in a very short time. I

It is possible with this device for one man to easily insert a piston in a cylinder even when they are comparatively of large 40 diameter and provided with heavy rings. The handles in this construction are shown as made of heavy sheet metal twisted at the inner ends to form knuckles for the pivotal connections 17 and 18, but other forms of handles can be used, it being desirable, however, to give relatively long ends to the handles so as to multiply the power at the ends attached to the band so as to make it easy to compress the heavier ring. Having thus described my invention, I claim:

1. A device for forcing piston rings into I the grooves of pistons comprising a band with free ends, a pair of handles pivoted together near one end, one of the handles adjacent to the pivot thereof being secured to the band adjacent to one end thereof, and

means for adjustably securing the other of said handles at its point of attachment to the band.

2. A device for forcing piston rings into the grooves of pistons comprising a band with free ends, a pair of handles pivoted together near one end, one of the handles adjacent to the pivot thereof being secured to the band adjacent to one end thereof, means for adjustably securing the other of said handles at its point of attachment to the band, and means for holding the handles in various positions relative to each other.

3. A device for forcing piston rings into the grooves of pistons comprising a band having ends adapted to overlap, abutments on the top edge of the band, a pair of handles pivoted together near one end, the end of one handle being pivotally secured to the band near one end thereof, a toothed arm pivotally secured to one end of the other handle, and a bracket on the band with which the teeth of said arm are adapted to be brought in engagement.

4. A device for forcing piston rings into the grooves of pistons comprising a band having ends adapted to overlap, abutments on the-top edge of the band, a pair of handles pivoted together near one end, the end of one handle being pivotally secured to the band near one end thereof, a toothed arm pivotally secured to one end of the other handle, a bracket 0n the band with which the teeth of said arm are adapted to be brought in engagement, and means for holding the handles in various positions relative to each other.

5. A device for forcing piston rings into the grooves of pistons comprising a band having ends adapted to overlap, abutments on the top edge of the band, a pair of handles pivoted together near one end, the end of one handle being 'pivotally secured to the band near one end thereof, a toothed arm pivotally secured to one end of the other handle, a bracket on the band with which the teeth of said arm are adapted to be brought in engagement, and a loop encircling both handles, the handles being constructed to be engaged by the loop to hold the handles against spreading.

In testimony that I claim the foregoing, I hereto set my hand, this 24th day of December, 1915.

' DAVID. H. BURD. 

